National Repository of Grey Literature
Not a member yet
574846 research outputs found
Sort by
On Kundt spacetimes in higher dimensions
No full textIn this thesis, we focus on Kundt spacetimes in higher dimensions with an emphasis on a special subclass of Weyl and traceless-Ricci type N. We summarize the boost weights classification method in higher dimensions and analyze how it constricts the Riemann tensor. We calculate the components of the Riemann tensor for the metric in adapted coordinates, which contain transversal part, a null part, and a combined part with both spatial and null coordinates. For the "combined" part of the metric, we calculate the antisymetrized derivative - an original result of this thesis - and then we will demonstrate how it can be eliminated. With a redefinition of the affine parameter, we can transform away the whole "combined" part. This extends a result from four dimensions, where this was already known. Finally, we illustrate our result on two gravitational theories: higher dimensional general relativity and quadratic gravity
Third-party Matchmaking Discord Bot for Valorant
No full textOne of the common tasks in online multiplayer games is matchmaking, i.e., assembling a game with concrete players and game settings. Players, in general, want to be matched with similarly skilled players while spending little time waiting for a match. Players may also have different preferences regarding maps, roles, or other settings. Often, match- making systems disregard such preferences. In this thesis, we examine in-game matchmaking and existing third-party options for Valorant and other games. Based on our observations, we propose a matchmaking Discord Bot Valorant focused on improving the user experience. The Bot works on different Discord servers separately and provides slash commands for users to interact with it. We also improve matchmaking functionalities, such as player selection, player rating, and map selection.
The role of an infant minipuberty in the development of undescended testis
No full textSpermatogonia maturation is put in relation to postnatal minipuberty. Overall neoadjuvant hormonal therapy or adjuvant therapy according to testicular biopsy has been recommended in patients indicated for surgery. However, association with course of minipuberty, with anatomical has not been studied in these patients. The study aims to relate minipuberty to testicular descent, its anatomy and genetic changes, to determine possible effect of hormonal treatment on testicular descent, hormonal levels and anatomical anomalies, and possible impact of hormones from mother's milk. Infants will be closely monitored starting 3 months of age and milk of breast-feeding mothers examined. Boys indicated for surgery will be randomly assigned directly to surgery or pre-treated with LHRH analogue. An infant control group without cryptorchidism examined during minipuberty will be created. Follow-up until puberty will be emphasized. Acquired data will determine criteria for hormonal therapy instead of invasive and potentially harmful biopsy, and become pilot data for a long-term multicentric study Keywords: minipuberty, cryptorchidism, infertility, hormonal treatment, gonadoreli
A Child Narrator in Selected Novels in the 1930s
No full textThe bachelor's work is focusing on deep analysis of the narrator and the child perspective in chosen works from authors Božena Benešová, Jaroslav Havlíček and Egon Hostovský. All of the chosen characters are examined from the narratological viewpoint, in the interpretive probes we are trying for a deeper understanding of the characters as movers of the narrative and space-time. The work is dedicated to the general understanding of the child role in chosen prose texts and further compares the execution of these narratives in individual texts. Key words: Egon Hostovský, Božena Benešová, Jaroslav Havlíček, narrator, child characters, focalization, child perspectiv
(Re)presentation of female action sports athletes - A framing analysis of selected Red Bull action sports movies
No full textCílem této práce je analyzovat reprezentaci sportovkyň v médiích akčních sportů na příkladu filmů společnosti Red Bull. Jejím cílem je odhalit, nakolik jsou sportovkyně zastoupeny kvantitativně, a také ukázat, v jakých rámcích jsou zobrazovány. Za účelem získání těchto poznatků byla pro účely této práce provedena kvantitativní analýza a analýza rámování. Ačkoli existuje slušné množství výzkumů o reprezentaci sportovkyň v mainstreamových sportovních médiích, jejich reprezentace v médiích akčních sportů je stále ještě okrajovým tématem s malým množstvím publikované literatury. Tato práce pomůže přispět k dosud malému množství výzkumů na toto téma. Tato studie zjistila, že ženy sportovkyně jsou v médiích akčních sportů stále zřetelně méně zastoupeny ve srovnání s muži sportovci. Navíc jsou zastoupeny v méně sportovních disciplínách a také v méně extrémních disciplínách. Vzhledem k tomu, že jsou reprezentovány v menším počtu rámců než sportovci, jsou ženy sportovkyně omezeny na specifické způsoby provozování akčních sportů, zatímco muži sportovci jsou zobrazováni v mnoha různých rámcích, které definují akční sporty. A konečně, některé z nalezených rámců také podporují stereotypní zobrazování pohlaví
Voltammetric Determination of the Drug Imipramine on a Graphite Composite Electrode
No full textThe diploma thesis dealt with the development of voltammetric methods and optimization of conditions for the determination of the antidepressant imipramine using ultra trace graphite electrode (UTGE). Two techniques were used for the measurements: DC voltammetry (DCV) with the parameters - mixing time before analysis 5 s, polarization rate 20 mV/s, and potential step 3 mV; and differential pulse voltammetry (DPV) with the parameters - mixing time before analysis 5 s, pulse height 50 mV, pulse width 100 ms (current sampled last 20 ms), pulse period 150 ms, potential step 3 mV, and polarization rate 20 mV/s. In the first part of the work, pH dependence (measured in Britton-Robinson buffer), repeatability of the determination over the whole width of the anodic potential window, and repeatability of the determination over a narrow range of potentials in the vicinity of individual analyte peaks were studied. Imipramine exhibited two peaks, based on which the optimal pH of the medium was selected. For DPV, pH = 5 (for peak 1) and pH = 10 (for peak 2) were selected, while for DCV, pH = 3 (for peak 1) and pH = 10 (peak 2) were selected. In the second part of the work, the calibration dependences in the concentration range of 0.1-100 µmol/l in deionized water, drinking water, and river water matrices were..
Criminal offenses in road traffic
No full textKey words: traffic accident, traffic crime, traffic crime perpetrators The author deals with the specifics of traffic crime from the perspective of substantive criminal law, criminology and criminology in her final thesis, which mainly consist of the perpetrator, negligence and the causes that lead to the traffic accident. The thesis also focuses on describing typical crimes commonly committed in traffic. It also focuses significantly on the issue of prevention, which is one of the main issues of government traffic policies, which examine what measures can be used to reduce the number of traffic accidents. The sixth chapter of the thesis is devoted to traffic and criminal law policies, which considers all aspects that must be considered when creating legal regulations in order to prevent and fight traffic crime. The conclusion of the thesis is that although the state spends considerable resources on the fight against traffic crime and generally pays considerable attention to traffic and its safety, it does not always succeed in effectively preventing traffic crimes. From the facts found, it is clear that, unlike many other areas of criminal law, traffic crimes are more directly dependent than other illegal acts on a number of variables that are little influenced by humans, but which often..
Explaining Recommender Systems in Content-rich Domains
No full textServices on the internet need to handle increasing volumes of data and so do the users. Information retrieval systems prevent overloading of users with extensive amount of information, the class of these systems used in ecommerce is called recommender sys- tems. They select a subset of data to be presented to users. This selection is based on multiple criteria, which can be generalized as the estimated preferences of the users. Recommender systems are being used in all ecommerce domains, but are their capabil- ities fully exploited? This thesis analyzes the current usage of recommender systems in ecommerce and identifies problems in one of the domains, content-rich products. This thesis suggests possible ways to improve exploitation of the recommender systems in these domains and provides sample implementation of an interactive system rich with product and attribute explanation in the form of a web application. User study was conducted to evaluate the proposed solution, hopefully leading to better cooperation of users and recommender systems.